KokkosKernels: SPMV performance comparison test

Created by: crtrott

This adds a performance comparison test without MPI for just SPMV kernel. Can compare the KokkosKernel function, a custom Kokkos implementation, CuSparse and MKL. This can read MatrixMarket format, and also generate a binary matrix storage file, which it can read again. Depending on your system reading the binary format back in can be 10x faster than the text file.

I had that written quite a while ago I just cleaned it up now.